Operation Manual – Getting Started
H3C VG Series Voice Gateways
Chapter 2 Fundamental Configuration
2-23
VI. Setting MTU
The parameter MTU (maximum transmission unit) affects segmentation and
reassembly of IP packets.
Perform the following configurations in Ethernet interface view.
Table 2-21
Set MTU
Operation
Command
Set MTU
mtu
size
Reset MTU to the default value
undo mtu
By default, the MTU size for Ethernet_II frame is 1500 bytes and that for
Ethernet_SNAP frame is 1492 bytes.
VII. Setting speed for an FE interface
The FE interface can run at the rate of 10 Mbps or 100 Mbps.
Perform the following configuration in Ethernet interface view.
Table 2-22
Set speed for an FE interface
Operation
Command
Set speed for an FE interface
speed
{
100
|
10
|
negotiation
}
By default, the speed is set as negotiation. You can also set a value for the speed, but
note that the value should be equal to the actual speed.
VIII. Setting Ethernet interface mode
The Ethernet interface can runs in both full duplex and half duplex modes. When
connected with Hub, it runs in half duplex mode. When connected with LAN Switch, it
runs in full duplex mode.
Perform the following configuration in Ethernet interface view.
Table 2-23
Set Ethernet interface mode
Operation
Command
Set Ethernet interface mode
duplex
{
negotiation
|
full
|
half
}
The Ethernet interface runs in negotiation mode by default.
IX. Enabling or disabling loopback on an Ethernet interface
Loopback is required at the Ethernet interface in testing some special functions.
